Water-seal vacuum-valve



J. H. LINDSAY.

WATER SEAL VACUUM VALVE. APPLICATION FILED FEB. H 1920.

1,353,767, Patented Sept. 21,1920.

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TEN F. 1

WATER-SEAL VACUUM-VALVE.

To all whom it may concern.

Be it known that 1-, JOHN H. LINDSAY, a citizen of the United States, and a resident of the city of New Yorl ,"borough of Brooklyn, in the county of Kings" and State of New York, have invented anew and Improved Water-Seal Vacuum-Valve, of which the following is a and exact description. v

This invention relates to improvements in water seal vacuum valves, an object of the invention being to prevent the escape of steam and to render the thermostatic element full, clear,

.quickly'responsive to the level of water and invention consists in certain novel features of construction, and combinations and arrangements of parts as will be more fully hereinafter described and pointed out in the claims.

I In the accompanying drawings- Figure 1 is a View in longitudinal section illustrating my improvements;

Fig. 2 is a view in section on of Fig. 1; v

' Fig. 3 is a viewin section'on the line 33 I of Fig. 1; and I Fig. ais'a' fragmentary view in vertical section illustrating amodification.

1 represents the casing of my improved valve having a 'screwthreaded inlet nipple 2 at one end which is connected by a pipe union 3 with a supply pipe or nipple 4 to be connected to the steam pipe line. .The-

the line 2-2 casing 1 ismade with a concave bottom 5 having a central outlet'opening 6 communi: eating with an integral outlet pipe 9, the

latter having a screw threaded end 11 re-- ceiving a nipple12 adapted to be connected to the water outlet'line which may, or may notbe provided with the ordinary suction pump. V

The casing 1 is made with an internal annular flange 13 and is internally screw threaded above the flange, as shown at l l, to receive a screw threaded ring 15 and a removable cap16 is screwed onto the upper end of the casing normally closing the same.

Specification of Letters Patent.

Patented Se t; 21,1920.

Applicationfi'led. February 11, 1920. Serial No. 357,849.

A corrugated metal post'17 secured at its upper end in the ring 15 and constitutes a thermostat controlling the operationfof a valve 18 the latter adapted to control the flow of water of condensation through the. outlet 6. A d1sk'19 is secured in the lower end of the post or thermostat 17 and a valve stem 20 carrying the valve 18 projects through the center of the disk 19 and a ring 21 is fixed to the wall of the thermostat at the intermediate portion of thelatter so asto strengthen the latter.

The upper end of the stem 20 is guided 1n 1t's movement by a hollow cup 22 which is connected by integral arms 23 withthe ring 15, and a removable screw 24' is located in the ring 15 outside of the thermostat 17 and 1 extends through the ring so that'when this screw is removed, the opening'25 into which it fits, will constitute a'testing port for the casing outside of the thermostat.

An integral tubular extension 26 is proyided on the casing 1 and projects into an inlet passage 27 formed in the nipple 2 and constitutes a steam passage 28 connecting the upper portion of the casing 1 with the inlet passage 27, but it will be noted that the lower end of the tubular extension 26 extends into the inlet passage 27 so'that its wall constitutes a seal or cut-off when the water rises sufliciently inthe casing. A

wall 29 of the casing '1 adjacent the inlet;

passage 27 extends across the inlet passage so as to partially close the same as indicated at 30, and extends lowerthan thelower-end of the tubular extension 26.- This wall or partition 29 likewise constitutes a'water seal cutting off thepassage of steam to-the casingwhen the water-reaches a predetermined level, but permits the passage of steam through the passage 28 ,to the casing 1.

The parts are shown inFig. 1 with the valve 18 opened allowingthe water to escape and showing thewater at a level suffi -'cient to out off the steam passage 28. When the water falls to a level slightly belowthat indicated, the steamwill flow through the passage 28 into the upper portion'of casing 1 and the heat of the steam will cause the thermostat 17 to e ipand, but this operation of the thermostat will be slow'because ofthefact that the water at "the bottom thereof is colder than the steaml'and the thermostat will not completely close the valve until most of the water has beenal- -1owec1 to escape. The closing of the valve almost entirely by the water or the level of water in contact therewith as the steanrhas ordmarily had communication with the upper end of the casing at all times so that in reality only the lower end of the thermostatic post was caused to contract andexpand and theoperation of the valve was ordinarily too quick in opening and too slow in closing so that steam would escape. lVith my improved construction steam is cut oil from the casing when the water reaches the level shown in Fig. 1, and hence, the reduction of temperature in the casing 1 will cause the thermostat throughout its entire length to contract opening the valve 18. W hen the water falls below the point indicated in Fig. l, the steam will flow through the passage 28 to the upper end of the cas ing and increase the temperature in the easing to cause the thermostat to expand, but, as above stated, this expansion will be relatively slow until the water falls below the end of the partition or wall '29 when the expansion will be rapid and the valve will close before the entire quantity of water can escape to prevent the loss of steam.

In Fig. 4:, I have illustrated a modification in which I employ a tubular extension 26 which is screwed into a cup 2? corresponding to the cup 22 and provides an extended guide for a stem 28' of a valve-29'. In other respects the construction is similar to the preferred form.

Various other slight changes may be made in the general form and arrangement of parts described without departing from the invention, and hence I do not limit myself to the precise details set forth, but consider myself at liberty tomake such changes and alterations as fairly fall within the spirit and scope of the appended claims.

I claim: I

1. A valve of the character described, comprising .a casing having an outlet in its bottom, and an inlet in itsside at its lower end, a valve controlling the outlet, a thermostat controlling the movement of the valve, a par tition wall in said casing projecting partially across the inlet, and a steam passage connecting the inlet with the upper end of the casing and having a Wall extending partially across the inlet.

2. A valve of the character described, com prising a casing having an outletin its hottom, and an inlet in its side at its lower end, a valve controlling the outlet, a thermostat controlling the movement of the valve, a partition wall in said casing projecting partially across the inlet, and a steam passage connecting the inlet with the upper end of the casing and having a Wall extending partially across the inlet, said first-mentioned wall extending appreciably below the last-mentioned wall, said walls when the water reaches predetermined levels forming seals.

3. A valve of the character described, comprising a casing having a conical or sloping bottom, and an outlet port in the lowest portion of said bottom, said casing having an inlet at its side at its lower end, a valve in the casing controlling the outlet port, a thermostat controlling the movement of the valve, a removable ring in the casing ,sup porting the thermostat and the valve, a guide cup supported by the ring, a stem on the valve engaging the guide cup, and a disk secured between the ends of the stern and engaging the walls of the thermostat.

l. A valve of the character described, comprising a casing having a conical or sloping bottom, and an outlet port in the lowest portion ofsaid bottom, said casing having an inlet at its side at its lower end, a valve in the casing controlling the outlet port, a thermostat controlling the movement of the valve, a removable ring in the casing supporting the thermostat and the valve, a guide cup supported by the ring, a stem .on the valve engaging the guide cup, a disk secured between the ends of the stem and engaging the walls of the thermostat, said casing having a partition therein extending partially across the inlet and having a steam passage connecting the inlet with the upper end of the casing.

5. A valve of the character described, comprising a casing having a conical or sloping bottom, and an outlet port in the lowest portion of said bottom, said casing having an inlet at its side at its lower end, a valve in the casing controlling the outlet port, a thermostatcontrolling the movement of the valve, a removable ring in the casing sup porting the thermostat and the valve, a guide cup supported by the ring, a stem on the valve engaging the guide cup, a disk secured between the ends of the stem and engaging the wallsof the thermostat, said casing havinga partition therein extending partially across the inlet and having a steam passage connecting the inlet with the upper end of the casing, and said steam passage having a Wall also projecting partially across the inlet.

6. A valve of the character Stated, comprising a casing having an outlet port in its bottom, and an inlet port in its side at its lower end, a rlng removably secured in the ceiving the upper end of the stem, a removable cap closing the upper end of the casing, and said I casing having a steam passage therein connecting the'upper end of the casing with the inlet of the casing.

JOHN H. LINDSAY. 

